Roof-joint



m/ 5 5/5 TOE A, l. CHURCHiLL noor JOINT. APPLICATION HLED SEPT- 2711915.

ALLEN JESSUP cnuncnrrin, or PORTLAND, onncoiv.

' ROOF-JOINT.

Specification'of Letters Patent.

Patented Aug. 22; ra n.

Application filed September 27,1915. Serial No. 52,806.

To all whom it may concern:

Be it known that I, ALLEN J. CHURCHILL,

=-.a citizen of the United States, residing at Portland,in the county of Mult'nomah and State of Oregon, have invented a new and useful Roof-Joint, of which the following is a specification.

This invention'relates to roof joints for making weatherproof the junction between the exposed surface of the roof and a pipe projecting through the roof for Ventilation purposes. v

.The object of the invention is to supply in a single unitary structure a roof joint which will rovide a weatherproof joint and adapt itself to varying angles between the vertical vent pipe projecting through the roof and the angle formed by the intersection of the roof line, and which will, at the same time, provide acheap and durable weatherproof device. I

I The improved roof joint consistsof a sheet or base preferably of sheet metal, perforated to. receive the projecting pipe section; around the perforation, a hollow cone of sheet metal is fixed to the base by areinforc ing joint; this cone is truncated, and the reinforcing ring is flanged, the flange taking against the under-side of the base, and being riveted to the cone or to both cone and base, the idea being to prevent any ordinary manipulation from disturbing the junction between this'truncated cone and the base. The major axis of the cone is located at an acute angle with respect to the plane of the base or sheet, and a truncated cone of soft metal, like lead, is attached to the free end of the first named cone; these two cones are joined at their apices, and the last named cone being formed of soft metah'is adapted to form a long watertight junction with the surface of the vent pipe, its free edge being compressed upon the exterior of the vent pipe, and to make this junction completely watertight, plumbers cement or red lead. paste maybe applied.

- The accompanying drawing illustrates the invention.

Figure 1 shows the roof joint applied; Fig. 2 shows a front elevation of the joint; Fig. 3 is a vertical section of the device as manufactured and before being fitted to the pipe; Fig. 4 is a side elevation and Figs.

5 and 6 are details, showing the applicability of the joint to roofs of different pitch.

. There is a base piece of sheet metal 7); the perforation is inclosed by a flange of sheet metal in the form of a hollow truncated cone 0. The meeting edges of the sheet metal from which this portion 0 is formed, are folded and united to form a watertight unction, as shown at 20. The section has a long edge 17 and a short edge 10. adapting it to form an acute angle with the base 6; v

the lower edge of c is flanged as shown at 11,

base b,"to reinforce and stiffen the junction between base I? and the sectiono, a ring of the flange rests on the exposed surface ofthe.

sheet metal 12 is provided which is riveted to the part c, as at let; the edge of the ring 12 is flanged, at 13, and this flange 13 underlies the base I), see Fig. 3. This reinforcement provides against a lealg at the junction between the part .0 and Z2,'in,case any deflection from the vertical occurs in the location of the vent pipe 0. The free end or apex of the cone-shaped section a is united to the apex ofa cone-shaped section m; in other wor ds, the section on is a flange of soft metal having its greatest diameter at its free edge; it re sults from this construction that any pitch of the roof say from one-quarter inch to onehalf inch drop per foot, can be accommodated in one unitary structure. 'VVhen the roof joint described is in position, and the vent pipe 4, is in place, as shown in Fig. 3, the flange m is closed down upon the coating of plumbers cement n and a long tight joint results from contracting the flange or cone m upon the vent pipe,=and a calking tool may be used on the free edge of the flange m. Y

What I claim is:

. 1. In a roof joint, the combination. of a section of thin, sheet-metal in the form of a truncated cone flanged at its base, a. flanged ring of metal fixed to the base of said cone section adapted toimpart rigidity thereto, a perforated base of metal clamped between said ring flange and said cone flange, and a flexible section of soft sheet metai in the 1 2. In a roof joint, the combination of a section. of thin, sheet-meta], in the form of a truncated cone flanged at; its base, a rigid, flanged ring, fixed to the cone base; a per 5 forated base of sheetmnetal, its inner edge located between the ring flange and the cone flange, and a soft, thin, sheet-meta1 trun- Gated cone having its apex fixedly united to 'the apex of the first-named eene seetien its base free, Said cone section adapted t form a long junction with the vent pipe.

ALLEN JESSUP CI'iUE-CH QLL.

"Witnesses H. LIVINGSTON, L. B. SMlTH. 

